“Two all beef patties, special sauce, lettuce, cheese, pickle, onions on a sesame seed bun” — and it’s 14 feet tall. The World’s Largest Big Mac is inside a McDonald’s located along the historic Lincoln Highway in North Huntingdon, Pa., just south of Pittsburgh. The restaurant also houses a Big Mac Museum, featuring items such as bobbleheads, Big Mac packaging through the years, and old equipment that once helped make the sandwich that launched an advertising and food craze. According to Roadside America, the museum was opened in 2007 on the 40th anniversary of the birth of the Big Mac. RA explains the restaurant isn’t the actual birthplace of the famous double-decker sandwich, however; that honor goes to another McDonald’s located in nearby Uniontown run by the same family. The North Huntingdon location is right off the Pennsylvania Turnpike, so it gets more traffic. I wonder what’s in that special sauce, anyway? Visited December 2008.